| Value | Category | Cases | |
|---|---|---|---|
| 1 | 7th grade (basic education) | 514 |
19.3%
|
| 2 | 8th grade (basic education) | 481 |
18.1%
|
| 3 | 1st year of middle education | 439 |
16.5%
|
| 4 | 2nd year of middle education | 546 |
20.5%
|
| 5 | 3rd year of middle education | 456 |
17.2%
|
| 6 | 4th year of middle education | 222 |
8.4%
|
| Sysmiss | 14 |